Modified bituminous composition for roof membranes
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
Problems solved by technology
Method used
Examples
Example
EXAMPLE 1
This Example is an example of the process of the invention and of the compositions attainable thereby.
In this Example, the elastomer modifier used was a tri-block copolymer (SBS: Fina 411, a high molecular weight of star-type sequence SB connection structure). The cross-linking reagents selectively used were two different types of reagents, namely elemental sulfur and phenol-aldehyde resin (marketed by TexPar). The compositions and testing results are shown in Table I below.
The compositions were prepared using the following procedure: SBS was fully dispersed and mixed into bitumen using a Polytron mixer at a temperature range about 185.degree. C. for about 60 minutes. The cross-linking reagent was quickly dispersed into the elastomer dispersed bitumen mixture at a fixed amount, depending on the type of the reagent used (see formulations in Table I) and mixing was carried on for about 45 minutes. Then, the agitation was stopped and the temperature was maintained at above 150...
Example
EXAMPLE 2
This Example is an example of conventional elastomer modification of bitumen.
In this Example, the elastomer modifier used was the same type as in Example 1. The same cross-linking reagents from Example I were also used.
The compositions were prepared using the conventional procedure: SBS was dispersed, followed by addition of the reagent and mixed in bitumen at the same processing temperature using the Polytron mixer for about 1 or 2 hours. The process also involved the procedure based on the recent prior art using incremental loading technique of reagent and / or SBS at the same processing temperature using Polytron mixer for the same period of time.
The compositions or formulations and testing results are shown in Table II below.
The results set forth in Tables I and II show that acceptable performance in terms of softening point, (high temperature stiffness) and cold flexibility can be achieved at significantly lower polymer loadings than in the prior art, as demonstrated in ...
Example
EXAMPLE 3
Modified bituminous roofing membranes have been prepared using the sulfur-reacted SBS-filler modified bitumen system, in which a polyester reinforcement mat (width / thickness: 100 mm / 1.4mm) is used as the carrier and the top ply of the membrane surfaced with slate granules. The SBS-filler modified binder was coated on the carrier at a rate of approximately 3,600 g / m.sup.2. The compositions and results of the roofing membranes set forth in Table III prove that acceptable performance in terms of softening point, flow resistance at 100C for 2 hours and cold bend temperature can be achieved at significantly lower polymer loading levels, in fact over 15% less polymer by wt. of the bitumen, as compared to conventional processing.
SUMMARY OF THE DISCLOSURE
In the summary of this disclosure, the present invention provides novel bituminous compositions used to produce roofing membranes having the desired characteristics of stiffness at high temperatures and cold flexibility, using cros...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Temperature | aaaaa | aaaaa |
| Temperature | aaaaa | aaaaa |
| Angle | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to view more - R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap